The storm reached its peak intensity late on September 2 and made landfall on China the next night dissipating not long afterward.

[2] By the next day, a broad Lower-Level-Circulation-Center (LLC) had formed with the upper-level environment in the region favorable for additional strengthening.

[2] That night, PAGASA began to issue warnings on the disturbance designating it as Tropical Depression Mameng while the system was 400 miles (640 km) northwest of Palau.

[2] The next morning, the JTWC issued a Tropical Cyclone Formation Alert on the developing disturbance because satellite imagery had suggested that a separate LLC was forming in one of the clusters of thunderstorm activity.

[3] Early the next morning, the JTWC relocated the circulation center 200 miles (320 km) to the north as the depression began to approach the island of Luzon.

[1] Rains from the storm destroyed 2000 houses and damaged 8326 more, and disrupting electric power, communication and traffic in some areas of the region.